Merryweather stopped to light a lantern, and then conducted us
down a dark, earth-smelling passage, and so, after opening a
third door, into a huge vault or cellar, which was piled all
round with crates and massive boxes.

"You are not very vulnerable from above," Holmes remarked as he
held up the lantern and gazed about him.

"Nor from below," said Mr. Merryweather, striking his stick upon
the flags which lined the floor. "Why, dear me, it sounds quite
hollow!" he remarked, looking up in surprise.

"I must really ask you to be a little more quiet!" said Holmes
severely. "You have already imperilled the whole success of our
expedition. Might I beg that you would have the goodness to sit
down upon one of those boxes, and not to interfere?"

The solemn Mr. Merryweather perched himself upon a crate, with a
very injured expression upon his face, while Holmes fell upon his
knees upon the floor and, with the lantern and a magnifying lens,
began to examine minutely the cracks between the stones. A few
seconds sufficed to satisfy him, for he sprang to his feet again
and put his glass in his pocket.

"We have at least an hour before us," he remarked, "for they can
hardly take any steps until the good pawnbroker is safely in bed.
Then they will not lose a minute, for the sooner they do their
work the longer time they will have for their escape. We are at
present, Doctor--as no doubt you have divined--in the cellar of
the City branch of one of the principal London banks. Mr.